package com.walmartlabs.concord.runtime.v2.runner.el;

/*-
 * *****
 * Concord
 * -----
 * Copyright (C) 2017 - 2020 Walmart Inc.
 * -----
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * =====
 */

import java.lang.reflect.Method;
import java.util.Map;

public class FunctionMapper extends javax.el.FunctionMapper {

    private final Map<String, Method> functions;

    public FunctionMapper(Map<String, Method> functions) {
        this.functions = functions;
    }

    @Override
    public Method resolveFunction(String prefix, String localName) {
        if (prefix == null || prefix.trim().isEmpty()) {
            return functions.get(localName);
        }

        return functions.get(prefix + ":" + localName);
    }
}
